Upsert not working on a simple example

[goutamvenkatCatalan]

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using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using DotNet.Testcontainers.Builders;
using DotNet.Testcontainers.Configurations;
using DotNet.Testcontainers.Containers;
using Microsoft.EntityFrameworkCore;
using Newtonsoft.Json;

var _dbContainer = new TestcontainersBuilder<PostgreSqlTestcontainer>()
    .WithDatabase(new PostgreSqlTestcontainerConfiguration
    {
        Database = "db",
        Username = "postgres",
        Password = "postgres",
    })
    .WithImage("postgres:latest")
    .WithPortBinding(80, true)
    .WithCleanUp(true)
    .Build();

await _dbContainer.StartAsync();
var dbContext = CreateContext();
dbContext.Database.EnsureCreated();

dbContext.StatusEntities.Add(new Status()
{
    Id = 1,
    LastChecked = DateTime.UtcNow - TimeSpan.FromDays(1),
    Name = "blah"
});

await dbContext.SaveChangesAsync();

dbContext.StatusEntities.Upsert(new Status()
{
    Id = 1,
    Name = "mine"
}).Run();

Console.WriteLine(JsonConvert.SerializeObject(await dbContext.StatusEntities.ToListAsync()));

ApplicationContext CreateContext()
{
    var connectionString = _dbContainer.ConnectionString;
    return new ApplicationContext(
        new DbContextOptionsBuilder<ApplicationContext>().UseNpgsql(connectionString).Options);
}

public class Status
{
    [Key, DatabaseGenerated(DatabaseGeneratedOption.None)]
    public long Id { get; set; }
    public string Name { get; set; }
    public DateTime LastChecked { get; set; }
}


public class ApplicationContext : DbContext
{
    public ApplicationContext(DbContextOptions<ApplicationContext> options)
        : base(options)
    {
    }
    
    public DbSet<Status> StatusEntities { get; set; }
}

I have a console app here that tries to update StatusEntity on the Id column, however the name field doesn't change. Any ideas as to what's happening here?

[jimbrew]

Hello did you have any luck with this? I am getting an issue as well

42P01: relation "LiveTelemetry" does not exist

POSITION: 13

On this code here

                await _context.LiveTelemetry.UpsertRange(inputs)
                    .On(c => new { c.MessageSourceId, c.TelemetryMetricName, c.TimeStamp })
                    .NoUpdate()
                    .RunAsync(); 

                await _context.SaveChangesAsync();

I think the problem is it does not work with DBContexts that UseNpgsql I suspect it may only accept UseSqlServer